TWI887936B - Crystal resonator - Google Patents

Abstract

A crystal resonator includes a crystal sheet and an electrode group. The crystal sheet is in the form of a sheet and is formed integrally, and can be applied with a voltage to generate thickness shear oscillation in a movement direction that is not parallel to a thickness direction. The crystal sheet includes a first vibrating portion and a second vibrating portion arranged along the movement direction and connected to each other. The electrode group includes a first pair of electrodes arranged on the first vibrating portion, and a second pair of electrodes arranged on the second vibrating portion. The first pair of electrodes and the second pair of electrodes apply voltages of opposite polarity to the first vibrating portion and the second vibrating portion, respectively, so that the thickness shear oscillations generated by the first vibrating portion and the second vibrating portion vibrate in opposite directions or in opposite directions in the movement direction. In this way, the inertial forces caused by external interference on the first vibration part and the second vibration part can offset each other, thereby eliminating the acceleration vibration effect of the inertial force on the crystal piece, thereby achieving the effect of reducing the acceleration sensitivity.

Description

Crystal resonator

The present invention relates to a resonator, and in particular to a crystal resonator.

Referring to FIG. 1 , a known crystal resonator 1 is shown. The crystal resonator 1 is suitable for being installed in a resonant circuit and used as an electronic component that outputs a specific oscillation frequency signal. The crystal resonator 1 includes a crystal plate 11 and a pair of electrodes 12 respectively disposed at both ends of the thickness axis of the crystal plate 11. The pair of electrodes 12 are respectively electrically connected and fixed in the resonant circuit by two conductive adhesive blocks 13. When the pair of electrodes 12 is energized and a voltage difference is generated at both ends of the thickness axis of the crystal plate 11, the two crystal planes of the crystal plate 11 that are not parallel to the thickness axis will move repeatedly in opposite directions, causing the crystal plate 11 to vibrate at a fixed frequency as a whole, thereby outputting a specific vibration frequency signal. However, when the crystal resonator 1 is subjected to an external force and tilts, rotates or shakes relative to the external environment, the crystal plate 11 is equivalent to being applied with an inertial force, thereby affecting the vibration of the crystal plate 11, resulting in the problem of frequency shift in the crystal resonator 1.

Therefore, an object of the present invention is to provide a crystal resonator with reduced acceleration sensitivity (g-sensitivity).

Therefore, the crystal resonator of the present invention includes a crystal plate and an electrode set.

The crystal sheet is in the form of a sheet and is formed in one piece, and can generate thickness shear vibration in a movement direction not parallel to a thickness direction when a voltage is applied. The crystal sheet includes a first vibration part and a second vibration part arranged along the movement direction and connected to each other.

The electrode assembly includes a first pair of electrodes disposed on the first vibrating portion and a second pair of electrodes disposed on the second vibrating portion. The first pair of electrodes and the second pair of electrodes apply voltages of opposite polarity to the first vibrating portion and the second vibrating portion respectively, so that the thickness shear oscillations generated by the first vibrating portion and the second vibrating portion vibrate in opposite directions or in opposite directions in the movement direction.

In some embodiments, the wafer further includes two crystal planes located at two opposite sides. The crystal planes are parallel to the movement direction and perpendicular to the thickness direction. The shapes of the crystal planes are one of a rectangle, a perfect circle and an ellipse.

In some embodiments, the wafer is in the shape of a disk and further includes a cut surface parallel to the thickness direction, wherein the cut surface is used to define a crystal axis.

In some embodiments, the first pair of electrodes has an input terminal electrode and a first back electrode respectively disposed on two opposite sides of the first vibration part in the thickness direction. The input terminal electrode and the first back electrode are aligned with each other in the thickness direction. The second pair of electrodes has an output terminal electrode and a second back electrode respectively disposed on two opposite sides of the second vibration part in the thickness direction. The output terminal electrode and the second back electrode are aligned with each other in the thickness direction. The input terminal electrode and the output terminal electrode are located on the same side of the wafer and are spaced apart in the movement direction. One of the input terminal electrode and the output terminal electrode is a high potential electrode. The other of the input terminal electrode and the output terminal electrode is a low potential electrode. The first back electrode and the second back electrode are spaced apart in the moving direction, and the first back electrode is electrically connected to the output electrode, and the second back electrode is electrically connected to the input electrode.

In some embodiments, the first pair of electrodes has an input terminal electrode and a first back electrode respectively disposed on two opposite sides of the first vibration part in the thickness direction. The input terminal electrode and the first back electrode are aligned with each other in the thickness direction. The second pair of electrodes has an output terminal electrode and a second back electrode respectively disposed on two opposite sides of the second vibration part in the thickness direction. The output terminal electrode and the second back electrode are aligned with each other in the thickness direction. The input terminal electrode and the output terminal electrode are located on the same side of the wafer and are spaced apart in the movement direction. One of the input terminal electrode and the output terminal electrode is a high potential electrode. The other of the input terminal electrode and the output terminal electrode is a low potential electrode. The first back electrode is electrically connected to the second back electrode.

In some implementations, a distance between the input electrode and a side edge adjacent to the output electrode is less than 0.5 mm and is not zero.

In some embodiments, a surface of the input electrode and the output electrode that is parallel to the moving direction and perpendicular to the thickness direction has a shape that is one of a polygon, a perfect circle, and an ellipse.

In some embodiments, the crystal resonator is suitable for being electrically connected to a base via two conductive fixings. The crystal plate and the base are spaced apart in the thickness direction. The first vibrating portion and the second vibrating portion define a mutually joined interface. The two side edges of the interface parallel to the thickness direction are respectively connected to the conductive fixings. The first pair of electrodes also has an input terminal connecting electrode whose two ends are respectively connected to one of the conductive fixings and the input terminal electrode. The second pair of electrodes also has an output terminal connecting electrode whose two ends are respectively connected to the other of the conductive fixings and the output terminal electrode.

The effect of the present invention is that: by applying voltages of opposite polarities to the first vibration part and the second vibration part respectively through the first pair of electrodes and the second pair of electrodes, the inertial forces introduced by external interference to the first vibration part and the second vibration part can offset each other, thereby eliminating the acceleration vibration effect of the inertial force on the crystal piece, thereby achieving the effect of reducing the acceleration sensitivity.

Before the present invention is described in detail, it should be noted that similar components are represented by the same reference numerals in the following description.

Referring to FIG. 2 to FIG. 4 , a first embodiment of the crystal resonator 100 of the present invention is shown. The crystal resonator 100 is suitable for being electrically connected to a base 9 via two conductive fixing members 8. The base 9 may be a package provided with a circuit pattern, and is not limited to a specific form. The material of the conductive fixing members 8 is, for example, a conductive metal but is not limited thereto. Furthermore, the conductive fixing members 8 may be solidified between the crystal resonator 100 and the base 9 by means of silver glue dots or solder, and the crystal resonator 100 is suspended on the base 9.

The crystal resonator 100 includes a crystal plate 2 and an electrode group 3. The crystal plate 2 is inserted into the conductive fixing members 8 and is spaced apart from the base 9 in a thickness direction Z. The crystal plate 2 is, for example, quartz and is in a sheet shape. The oscillation mode of the crystal plate 2 is a thickness shear oscillation mode. That is, the crystal plate 2 can generate thickness shear oscillation in a motion direction X that is not parallel to the thickness direction Z when a voltage is applied. For the convenience of explanation, the extension direction of the thickness axis of the crystal piece 2 is defined as the thickness direction Z of the crystal piece 2, that is, the up-down direction of the crystal resonator 100 in FIG. 2 ; the left-right direction of the crystal resonator 100 in FIG. 2 is defined as the movement direction X of the crystal piece 2, and the movement direction X is not parallel to the thickness direction Z; the front-back direction of the crystal resonator 100 in FIG. 2 is defined as a width direction Y that is not parallel to the movement direction X.

The crystal piece 2 is formed in one piece and includes a first vibration part 21, a second vibration part 22 and two crystal planes 23 located on two opposite sides of the crystal piece 2. The first vibration part 21 and the second vibration part 22 are arranged along the movement direction X and connected to each other. The first vibration part 21 and the second vibration part 22 define a mutually joined interface 24. In this way, the first vibration part 21 and the second vibration part 22 have the same dimensions in the three axial directions of the movement direction X, the width direction Y and the thickness direction Z. In addition, the location of the interface 24 is the center of the crystal piece 2 in the movement direction X.

The crystal planes 23 are parallel to the movement direction X and perpendicular to the thickness direction Z. Each of the crystal planes 23 is a surface on the same side of the first vibration part 21 and the second vibration part 22. In the first embodiment, one of the crystal planes 23 is the top surface of the first vibration part 21 and the second vibration part 22, and the other of the crystal planes 23 is the bottom surface of the first vibration part 21 and the second vibration part 22. The shape of the crystal planes 23 is, for example, a rectangular shape, that is, the size of the crystal piece 2 in the movement direction X is larger than the size of the crystal piece 2 in the width direction Y. In this way, when the crystal piece 2 is divided into the first vibration part 21 and the second vibration part 22, the stress received at the joint between the first vibration part 21 and the second vibration part 22 (that is, the joint 24) is smaller and less likely to break. However, the shape of the crystal planes 23 can also be a perfect circle or an ellipse, and is not limited to a specific shape.

The electrode assembly 3 includes a first pair of electrodes 31 disposed on the first vibrating portion 21, and a second pair of electrodes 32 disposed on the second vibrating portion 22. The first pair of electrodes 31 and the second pair of electrodes 32 apply voltages of opposite polarity to the first vibrating portion 21 and the second vibrating portion 22, respectively, so that the thickness shear oscillations generated by the first vibrating portion 21 and the second vibrating portion 22 vibrate in opposite directions or in opposite directions in the movement direction X (see the arrows drawn on the wafer 2 in FIG. 4 ).

Specifically, the first pair of electrodes 31 has an input terminal electrode 311, a first back electrode 312, an input terminal anchoring electrode 313 and a first back anchoring electrode 314. The input terminal electrode 311 and the first back electrode 312 are respectively disposed on two opposite sides of the first vibrating portion 21 in the thickness direction Z and are aligned with each other in the thickness direction Z. The two ends of the input terminal anchoring electrode 313 are respectively connected to the top of one of the conductive fixing members 8 and the input terminal electrode 311; the two ends of the first back anchoring electrode 314 are respectively connected to the bottom of the other of the conductive fixing members 8 and the first back electrode 312. In the first embodiment, the input electrode 311 and the first back electrode 312 may have the same shape and area, and the input electrode 311 and the first back electrode 312 are completely aligned in the thickness direction Z. However, in other embodiments, the input electrode 311 and the first back electrode 312 may have different shapes or areas, so that the input electrode 311 and the first back electrode 312 are aligned in the thickness direction Z. The input electrode 311 and the first back electrode 312 are only partially aligned in the thickness direction Z, or the distance from the edge of the input electrode 311 to the edge of the first vibration part 21 is different from the distance from the edge of the first back electrode 312 to the edge of the first vibration part 21, so that the input electrode 311 and the first back electrode 312 are also only partially aligned in the thickness direction Z. When at least a portion of the input electrode 311 and the first back electrode 312 are aligned in the thickness direction Z, the input electrode 311 and the first back electrode 312 can apply a voltage to the first vibration part 21.

The second pair of electrodes 32 has an output electrode 321, a second back electrode 322, an output terminal connecting electrode 323 and a second back connecting electrode 324. The output electrode 321 and the second back electrode 322 are respectively disposed on two opposite sides of the second vibration portion 22 in the thickness direction Z and are aligned with each other in the thickness direction Z. The two ends of the second back-connecting electrode 324 are respectively connected to the bottom of one of the conductive fixing members 8 and the second back electrode 322, so that the second back electrode 322 is electrically connected to the input electrode 311; the two ends of the output-end connecting electrode 323 are respectively connected to the top of the other one of the conductive fixing members 8 and the output-end electrode 321, so that the output-end electrode 321 is electrically connected to the first back electrode 312. In the first embodiment, the output electrode 321 and the second back electrode 322 may have the same shape and area, and the output electrode 321 and the second back electrode 322 are completely aligned in the thickness direction Z. However, in other embodiments, the output electrode 321 and the second back electrode 322 may have different shapes or areas, so that the output electrode 321 and the second back electrode 322 are completely aligned in the thickness direction Z. The output electrode 321 and the second back electrode 322 are only partially aligned in the thickness direction Z, or the distance from the edge of the output electrode 321 to the edge of the second vibration part 22 is different from the distance from the edge of the second back electrode 322 to the edge of the second vibration part 22, so that the output electrode 321 and the second back electrode 322 are also only partially aligned in the thickness direction Z. When at least a portion of the output electrode 321 and the second back electrode 322 are aligned in the thickness direction Z, the output electrode 321 and the second back electrode 322 can apply a voltage to the second vibration part 22.

In other words, the input electrode 311 and the output electrode 321 are located on the same side of the wafer 2 (i.e., the top surface of the wafer 2) and are spaced apart from each other on the left and right sides in the moving direction X. The first back electrode 312 and the second back electrode 322 are both located on the other side of the wafer 2 (i.e., the bottom surface of the wafer 2) and are spaced apart from each other on the left and right sides in the moving direction X. Furthermore, the first back electrode 312 is electrically connected to the output electrode 321 and has the same potential; the second back electrode 322 is electrically connected to the input electrode 311 and has the same potential. In this way, when one of the input electrode 311 and the output electrode 321 is a high potential electrode and the other of the input electrode 311 and the output electrode 321 is a low potential electrode, a voltage difference is formed between the input electrode 311 and the first back electrode 312, and another voltage difference with a polarity opposite to the voltage difference is formed between the output electrode 321 and the second back electrode 322, so that the upper and lower sides of the first vibration part 21 respectively move in opposite directions repeatedly in the movement direction X, and the upper and lower sides of the second vibration part 22 respectively move in opposite directions repeatedly in the movement direction X. That is, as shown by the arrows in FIG. 4 , the top of the first vibrating portion 21 and the top of the second vibrating portion 22 vibrate toward each other, while the bottom of the first vibrating portion 21 and the bottom of the second vibrating portion 22 vibrate away from each other, thereby allowing the inertial forces introduced into the first vibrating portion 21 and the second vibrating portion 22 by external interference to cancel each other out, thereby eliminating the acceleration vibration effect of the inertial force on the crystal piece 2, thereby achieving the effect of reducing the acceleration sensitivity.

3 and 4 , in the first embodiment, a distance d between adjacent sides of the input electrode 311 and the output electrode 321 is less than 0.5 mm and is not zero.

Referring to FIG. 2 , preferably, the two side edges of the junction 24 parallel to the thickness direction Z are respectively connected to the conductive fixing members 8 , so that the wafer 2 is supported by the conductive fixing members 8 at the center in the movement direction X, and the left and right sides of the wafer 2 can be suspended symmetrically.

Referring to FIG5 , it is a simulation diagram of the vibration displacement in the movement direction of the thickness shear vibration generated by the first vibration part 21 and the second vibration part 22 when voltage is applied to the first vibration part 21 and the second vibration part 22. The arrows in FIG5 indicate that the first vibration part 21 and the second vibration part 22 vibrate in opposite directions in the movement direction X. In addition, the lighter grayscale portion in FIG5 indicates a larger vibration displacement, and the darker grayscale portion in FIG5 indicates a smaller vibration displacement. Therefore, in this first embodiment, the shape of the input electrode 311 and the output electrode 321 is, for example, a rectangle and a polygon that can cover the shallower part in Figure 5, but the shape of the input electrode 311 and the output electrode 321 is not limited to a polygon. The shape of the input electrode 311 and the output electrode 321 can also be a perfect circle or an ellipse, etc., which can cover the shallower part of the electrode pattern in Figure 5.

Referring to FIG. 6 and FIG. 7, the signal measurement results of the known crystal resonator 100 and the first embodiment are respectively obtained under the same test conditions. As shown in FIG. 7, when the first embodiment is applied with voltage to generate signals of different oscillation frequencies, its acceleration sensitivity (g-sensitivity) range is less than 0.2 ppb/g (close to 0.1 ppb/g); and as shown in FIG. 6, when the known crystal resonator 100 is applied with voltage to generate signals of different oscillation frequencies, its acceleration sensitivity range is 0.4 ppb/g~0.8 ppb/g. In other words, the first embodiment has a significantly better anti-acceleration effect than the known crystal resonator 100.

Referring to FIG. 8 to FIG. 10 , a second embodiment of the crystal resonator 100 ′ of the present invention is shown. The second embodiment is similar to the first embodiment in structure, and the first pair of electrodes 31 also has an input terminal electrode 311, a first back electrode 312, an input terminal connecting electrode 313, and a first back connecting electrode 314 ′. The second pair of electrodes 32 also has an output terminal electrode 321, a second back electrode 322, an output terminal connecting electrode 323, and a second back connecting electrode 324 ′. The difference between the second embodiment and the first embodiment is that the first back-anchored electrode 314' and the second back-anchored electrode 324' of the second embodiment are connected to each other, and the first back-anchored electrode 314' is separated from the conductive fixing members 8, and one end of the first back-anchored electrode 314' away from the second back-anchored electrode 324' is connected to the first back electrode 312; the second back-anchored electrode 324' is also separated from the conductive fixing members 8, and one end of the second back-anchored electrode 324' away from the first back-anchored electrode 314' is connected to the second back electrode 322. In this way, the first back electrode 312 and the second back electrode 322 have the same potential (zero potential). When one of the input electrode 311 and the output electrode 321 is a high potential electrode, and the other of the input electrode 311 and the output electrode 321 is a low potential electrode, a voltage difference can also be formed between the input electrode 311 and the first back electrode 312, and another voltage difference with a polarity opposite to the voltage difference can also be formed between the output electrode 321 and the second back electrode 322. The pressure difference can also make the thickness shear vibrations generated by the first vibration part 21 and the second vibration part 22 vibrate in the direction of movement X in the opposite direction or in the opposite direction, thereby making the inertial forces introduced by the external interference to the first vibration part 21 and the second vibration part 22 offset each other, thereby eliminating the acceleration vibration effect of the inertial force on the crystal piece 2, so as to achieve the effect of reducing the acceleration sensitivity.

Refer to Figure 11, which is a third embodiment of the crystal resonator 100'' of the present invention. The structure of the third embodiment is similar to that of the first embodiment. The difference between the third embodiment and the first embodiment is that the crystal sheet 2'' is in the shape of a disk and also includes a cut surface 25 parallel to the thickness direction Z, and the cut surface 25 is used to define the crystal axis. The two opposite side edges of the cut surface 25 are respectively connected to the crystal planes 23'' and are straight lines. In this third embodiment, the cut surface 25 can be formed by longitudinally cutting the crystal sheet 2''. In addition, the crystal planes 23'' are roughly circular, and a portion of the periphery of the crystal planes 23'' (i.e., the top edge and the bottom edge of the cut surface 25) are slightly flat, so as to define the crystal axis for use in external equipment alignment.

Referring to FIG. 12 , a fourth embodiment of the crystal resonator 100 ′″ of the present invention is shown. The fourth embodiment is similar to the first embodiment in structure, and the first pair of electrodes 31 also has an input terminal electrode 311, a first back electrode 312, an input terminal connecting electrode 313 ′″ and a first back connecting electrode 314. The second pair of electrodes 32 also has an output terminal electrode 321, a second back electrode 322, an output terminal connecting electrode 323 ′″ and a second back connecting electrode 324. The difference between the fourth embodiment and the first embodiment is that the input terminal anchoring electrode 313''' and the output terminal anchoring electrode 323''' of the fourth embodiment are symmetrically distributed at the two diagonal corners of the crystal piece 2 at the center of the crystal piece 2 in the movement direction X and the center of the crystal piece 2 in the width direction Y, and the positions of the conductive fixing members 8 corresponding to the input terminal anchoring electrode 313''' and the output terminal anchoring electrode 323''' are located at the two diagonal corners of the crystal piece 2, so that the left and right sides of the crystal piece 2 can be stably supported.

In summary, by applying voltages of opposite polarities to the first vibration part 21 and the second vibration part 22 respectively by the first pair of electrodes 31 and the second pair of electrodes 32, the inertial forces introduced by external interference to the first vibration part 21 and the second vibration part 22 can cancel each other out, thereby eliminating the acceleration vibration effect of the inertial force on the crystal piece 2, thereby achieving the effect of reducing the acceleration sensitivity, and thus the purpose of the present invention can be achieved.

However, the above is only an embodiment of the present invention and should not be used to limit the scope of implementation of the present invention. All simple equivalent changes and modifications made according to the scope of the patent application of the present invention and the content of the patent specification are still within the scope of the present patent.

100, 100', 100'', 100''': crystal resonator 2, 2'': crystal piece 21: first vibration part 22: second vibration part 23, 23'': crystal plane 24: junction 25: cut surface 3: electrode group 31: first pair of electrodes 311: input terminal electrode 312: first back electrode 313, 313''': input terminal connecting electrode 314, 314': first back connecting electrode 32: second pair of electrodes 321: output terminal electrode 322: second back electrode 323, 323''': output terminal connecting electrode 324, 324': Second back-mounted electrode 8: Conductive fixing member 9: Base X: Movement direction Y: Width direction Z: Thickness direction d: Spacing

Other features and effects of the present invention will be clearly presented in the implementation method with reference to the drawings, in which: FIG. 1 is a three-dimensional schematic diagram illustrating the implementation method of the known crystal resonator and the connection relationship between the known crystal resonator and two conductive glue blocks; FIG. 2 is a three-dimensional schematic diagram illustrating the implementation method of a first embodiment of the crystal resonator of the present invention electrically connected to a base by two conductive fixings; FIG. 3 is a cross-sectional schematic diagram along the line III-III in FIG. 2, and the conductive fixings and the base are removed; FIG. 4 is a front view schematic diagram illustrating the circuit connection relationship of the first embodiment; FIG. 5 is a simulation diagram illustrating the vibration displacement of the thickness shear vibration generated by a first vibration part and a second vibration part of the first embodiment in the movement direction; FIG6 is a data graph illustrating the measurement results of the acceleration sensitivity of different oscillation frequency signals generated by the known crystal resonator; FIG7 is a data graph illustrating the measurement results of the acceleration sensitivity of different oscillation frequency signals generated by the first embodiment; FIG8 is a three-dimensional schematic diagram illustrating the implementation method of the second embodiment of the crystal resonator of the present invention being electrically connected to the base by the conductive fixings; FIG9 is a cross-sectional schematic diagram along the line IX-IX in FIG8, and the conductive fixings and the base are removed; FIG10 is a front view schematic diagram illustrating the circuit connection relationship of the second embodiment; FIG11 is a top view schematic diagram illustrating the implementation method of a crystal sheet of a third embodiment of the crystal resonator of the present invention; and FIG12 is a schematic top view illustrating the implementation of the fourth embodiment of the crystal resonator of the present invention.

100:Crystal resonator

2: Crystal chip

21: First vibration part

22: Second vibration part

23: Crystal surface

24: Meeting

3: Electrode set

31: The first pair of electrodes

311: Input electrode

312: First back electrode

313: Input terminal connected to electrode

32: Second pair of electrodes

321: Output electrode

322: Second back electrode

323: Output terminal connected to electrode

8: Conductive fixings

9: Base

X: Movement direction

Y: width direction

Z: thickness direction

Claims (7)

A crystal resonator is suitable for being electrically connected to a base through two conductive fixing members, the crystal resonator comprising: A crystal sheet, which is in the form of a sheet and is formed integrally, and can be applied with a voltage to generate thickness shear vibration in a movement direction that is not parallel to a thickness direction, the crystal sheet includes a first vibration part and a second vibration part arranged along the movement direction and connected to each other, the crystal sheet and the base are spaced apart in the thickness direction, the first vibration part and the second vibration part define a mutually joined interface, and the two side edges of the interface parallel to the thickness direction are respectively connected to the conductive fixing members; and An electrode set includes a first pair of electrodes disposed on the first vibrating portion, and a second pair of electrodes disposed on the second vibrating portion, wherein the first pair of electrodes and the second pair of electrodes apply voltages of opposite polarity to the first vibrating portion and the second vibrating portion respectively, so that the thickness shear vibrations generated by the first vibrating portion and the second vibrating portion vibrate in opposite directions or in opposite directions in the movement direction, and the first pair of electrodes has an input terminal electrode and a first back electrode respectively disposed on two opposite sides of the first vibrating portion in the thickness direction, and the input terminal electrode and the first back electrode are aligned with each other in the thickness direction, The second pair of electrodes has an output electrode and a second back electrode respectively arranged on two opposite sides of the second vibration part in the thickness direction, the output electrode and the second back electrode are aligned with each other in the thickness direction, the input electrode and the output electrode are located on the same side of the crystal sheet and are arranged at intervals in the movement direction, the first pair of electrodes also has an input terminal connecting electrode whose two ends are respectively connected to one of the conductive fixings and the input terminal of the input electrode, and the second pair of electrodes also has an output terminal connecting electrode whose two ends are respectively connected to the other of the conductive fixings and the output terminal of the output electrode. A crystal resonator as described in claim 1, wherein the crystal piece further includes two crystal planes located on two opposite sides, the crystal planes are parallel to the movement direction and perpendicular to the thickness direction, and the shapes of the crystal planes are one of rectangular, circular and elliptical. A crystal resonator as described in claim 1, wherein the crystal sheet is in the shape of a disc and further includes a section parallel to the thickness direction, wherein the section is used to define the crystal axis. A crystal resonator as described in claim 1, wherein one of the input electrode and the output electrode is a high potential electrode, the other of the input electrode and the output electrode is a low potential electrode, the first back electrode and the second back electrode are spaced apart in the direction of movement, the first back electrode is electrically connected to the output electrode, and the second back electrode is electrically connected to the input electrode. A crystal resonator as described in claim 1, wherein one of the input electrode and the output electrode is a high potential electrode, the other of the input electrode and the output electrode is a low potential electrode, and the first back electrode is electrically connected to the second back electrode. A crystal resonator as described in claim 4 or 5, wherein the distance between the input electrode and the side edge adjacent to the output electrode is less than 0.5 mm and not zero. A crystal resonator as described in claim 4 or 5, wherein a surface of the input electrode and the output electrode parallel to the movement direction and perpendicular to the thickness direction has a shape that is one of a polygon, a perfect circle and an ellipse.